Promchot, W., Y. Boonchit, and S. Phetphuang. “The Development of Teacher Competency in Learning Management in School under Surat Thani Municipality”. Rajapark Journal, vol. 15, no. 41, July 2021, pp. 326-41, https://so05.tci-thaijo.org/index.php/RJPJ/article/view/250652.